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客户的问题：LE05这个单片机的输出模式是不是只有开漏输出？没有推挽吗？
Mathew_Huang LE05 MCU IO输出只有推挽输出，开漏输出可以把IO配置成输入模式，然后外部上拉
Mathew_Huang 用户需要接外部上拉电路；先设置PDOR对应bit置0 开漏高：GPIO设置为输入方向。具体操作：POER 设置对应bit置0. 开漏低：GPIO设置为输出方向并设置低电平。具体操作：POER 设置对应bit置1
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